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Journal of Sol-Gel Science and Technology

, Volume 65, Issue 2, pp 195–203 | Cite as

Enhanced photo-catalytic activity of TiO2 nanostructured thin films under solar light by Sn and Nb co-doping

  • Behzad Koozegar Kaleji
  • Navid Hosseinabadi
  • Akira Fujishima
Original Paper

Abstract

In this study, preparation of Sn and Nb co-doped TiO2 dip-coated thin films on glazed porcelain substrates via sol–gel process have been investigated. The effects of co-doping content on the structural, optical, and photo-catalytic properties of applied thin films have been studied by X-ray diffraction (XRD), field emission SEM (FE-SEM), high resolution transmission electron microscopy (HR-TEM), and UV–Vis absorption spectroscopy. Surface chemical state of thin films was examined by atomic X-ray photoelectron spectroscopy (XPS). XRD results suggest that adding impurities has a great effect on the crystallinity and particle size of TiO2. Titania Rutile phase formation in thin film was promoted by Sn4+ addition but was inhibited by Nb5+ doping. The prepared co-doped TiO2 photo-catalyst films showed optical absorption edge in the visible light area and exhibited excellent photo-catalytic ability for degradation of methylene blue (MB) solution under solar irradiation. Comparison with undoped and Sn or Nb-doped TiO2, codoped TiO2 shows an obviously higher catalytic activity under solar irradiation.

Keywords

Titania thin film Sol–gel dip coating Co-dopant Photo-catalytic activity Optical properties 

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Behzad Koozegar Kaleji
    • 1
  • Navid Hosseinabadi
    • 2
  • Akira Fujishima
    • 3
    • 4
  1. 1.Department of Materials Engineering, Faculty of EngineeringMalayer UniversityMalayerIran
  2. 2.Department of Materials Engineering, Faculty of EngineeringTarbiat Modares UniversityTehranIran
  3. 3.Photo-catalystic GroupKanagawa Academy of Science and TechnologykanagawaJapan
  4. 4.Tokyo University of ScienceTokyoJapan

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